Opera: LastPass, the password management system that's both universal and easy, has made it to Opera's very young extension platform. If you're running the Opera 11 Beta, you can use LastPass to save passwords or sync them from other browsers.

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Opera's extensions look a lot like Chrome's, and LastPass on Opera looks and feels a lot like its Chrome counterpart. There's a toolbar button, fields filled with a little red square, and access to advanced features if you need them, like one-time passwords and secure notes.